{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["RNA", "DNA", "protein", "cell type", "cell line"], "input": "In spite of its association with p50 in vitro, however, we found a lymphoid cell-specific nuclear factor in vivo that contains c-Rel but not p50 epitopes ; this factor, termed IL-6 kappa B binding factor II , appears to contain the c-Rel homodimer and preferentially recognizes several IL-6 kappa B-related kappa B motifs ."}
{"RNA": [], "DNA": ["IL-6 kappa B-related kappa B motifs", "kappa B motifs"], "protein": ["p50", "lymphoid cell-specific nuclear factor", "c-Rel", "p50 epitopes", "IL-6", "IL-6 kappa B binding factor II", "c-Rel homodimer"], "cell type": [], "cell line": []}